dropdown in dreamweaver on photoshop sliced button

What I'm looking to do is create a three item simple dropdown that will activate when rolled over a button on my page. I've seen many scripts that can do the drop down but I'm not sure how to apply it to my situation. I used photoshop to build the site and nav bar with the buttons as their own slices.

Any help would be appreciated
The site can be seen at rjccomps.com if my explanation was bad